Anywhere in the Northeast travel will be tricky for the next couple of hours. In northern Maine be careful the roads are snowy and icy. Everywhere else there is dense fog. I am surprised that there is no dense fog advisories. Here in Mahwah NJ visibility is down to 0.1 miles and has occasionally dropped even lower. Lake effect snow watches and warnings have been issued in some areas. Up to 20 inches of snow is possible. More maps and updates later.